buschmann



2 Sheetsf-Sheet 1.

(No-Model.)

ROCK DRILL.`

'PatentedApn 30 fda N4 PETERS, Phomumoguplmr. wzshington. D. C.

(No Model.) 2 Sheets-Sheet 2.,

P. BUSGHMANN. ROCK DRILL.

No. 402,229. Patented Apr. 30, 1889.

UNITED STATES PATENT OFFICE,

FRIEDRICH BUSOHMANN, OF HEILBRONN, GERMANY, ASSIGNOR TO THE SALZVVERK HEILBRONN, OF SAMEl PLACE.

ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 402,229, dated April 30, 1889.

, Application filed October 26. 1887. Serial No. 253,411. (No model.)

Patented in England August 16, 1887, No. 11,210; in' Belgium August 3l, 1887, No. 78,614; in France December 2, 1887, No.185,296; in Austria-Hungary January 28, 1888, No. 31,704 and No. 64,920: in Germany .Tune 8,1888, No. 43,306, andin Spain .Tune 12,1888,No. 8,005.

To all whom it may concern.'

Be it known that I, FRIEDRICH YBuson- MANN, a subject of the Emperor of Germany, residingV at Heilbronn, Germany, have invented a certain new and useful Improvement in Rock-Drills, of which the following is a specification. f y

The same has been patented to me in the following countries, to wit: England, No. 11,210, dated August 16, 1887; Germany, No. 48,806, dated June 8, 1888; France, No. 185,296, dated December 2,1887; Belgium, No. 78,614, dated August 81, 1887; AustriafI-lungary, No. 81,704 and No. 64,920, dated J anuary 28,1888; and Spain, No. 8,005, dated June 12, 1888.

`My improvement relates to rock-drills in which the boring-tool is forced downwardly and its lifting produced by a column of water forced into and out of a bore-hole.

I will describe arock-d-rill embodying my improvement in detail, and then point out the novelty in claims.

In the accompanying drawings, Figure 1 is a vertical section of a rock-drill embodying my improvement and portions of the apparatus employed for operating the same. Fig. 2 is a plan or top view of certain means for rotating the boring apparatus. Fig. 8 is a view similar to Fig. 1, but showing only the boring apparatus, the same being on a larger scale than Fig. 1. Fig. 4 is a bottom view of the chisel.

Fig. 5 is a longitudinal section similar to Fig.

. Fig. 7 is a detail of gripper-jaws shown in the responding parts in all the figures.

example illustrated in Fig. 5. Fig. 8 is a side elevation of pumping apparatus which may be employed in connection with the drill.

Similar letters of reference designate cor- A designates a pump, which may be of any desired kind to operate as a force and suction pump. It may be driven by an engine, B.

P designates a pipe, which may consist of flexible hose. This pipe connects at its upper end with a vertically-extending metallic pipe, k. The pipe cis supported from a link, R, to which is secured a rope or cable, R by which the pipe 7e and the boring apparatus may be lifted and lowered. The pipe 7e is coupled near its upper end to a couplingpiece, 7c', by a swivel-connection, so that it may be rotated therein. The pipe k is rectangular in cross-section and is coupled to a pipe, t'. The pipe t' has secured to it, near its lower end, the boring apparatus proper. The pipes 7c 'L' and the boring apparatus may all be turned during the operation of boring. This is accomplished by a ratchet-wheel, S, mounted on the pipe k and actuated by a pawl, S', mounted upon a lever, S2, having a swivel-connection with the hub of the ratchetwheel S. The lever S2 Inay be actuated by a rod, o, operated by a lever, o', deriving motion from the engine B, or in any other suitable' manner. The boring apparatus com prises a plungercylinder, a, in which the plunger for the boring-tool operates.

C designates a packing-ring constituting a plunger, and arranged upon the upper end of the shank b ofthe chisel to prevent the turning of the boring-tool during its longitudinal movement. The tool is provided with longitudinal grooves c, into which extend pins or projections extending from the inner surface of the plunger-cylinder a. A coil-spring, (l, arranged between the plunger C and an annular rim or ilange, C2, upon the inner side of the plunger-cylinder a, assists in moving the boring-tool in one direction.

F designates the chisel, which, in the ex ample of my improvement shown in Figs. 1 and 8, is adapted 'for full boring. Through the'head of the chisel extend passages h, communicating with a passage, g, which latter communicates in turn with the interior of the shank b of the boring-tool. Another passage,

g,'affords communication between the in- "terior of said shank and the upper part of the plunger-cylinder.

In the example of my improvement shown in Figs. 5, 6, and 7 the parts are like those shown in the previous example, except that a chisel for core-boring is employed and that the shank of the boring-tool is made in sections, the lower' section, X, of which is screwthreaded on the upper section, q, at r. The section q also extends in this instance somewhat above the plunger C, and is provided at its upper end with a head, through which eX- tends the aperture g. The lower portion of the interior of the section X is made conical, and within it is arranged a core-cutter, z., adapted, when the chiselis raised, to operate upon the conical surface just referred to, and so cut and break the core.

Tater is forced downwardly through the pipes k and t' into the plunger-cylinder, forcing the chisel down to make its stroke. If suction be then applied, it, with the assistance of the spring d, will again raise the chisel. A very rapid operation of the chisel may thus be occasioned. lVhen water is forced downwardly, a portion passes into the interior of the shank b of the tool, and thence through the chisel through the passages h, or, as in the example shown in Fig. 5, through the center of the chisel to wash the blades. This rinsingwater will be forced upwardly around the exterior of the plunger-cylinder and the pipe i to above ground. As the work proceeds, the boring apparatus may be lowered in any suitable manner in order to feed the tool.

lVhat I claim as my invention, and desire to secure by Letters Iatent, is-

l. In a hydraulic boring apparatus, the combination, with a pump, of a plunger-cylinder, pipe-connections between the saine, a plunger within the said cylinder, and a boring-tool connected with the plunger, all being so ar ranged and combined that the pump will cause the lifting and forcing downward of water in the bore-hole to elevate or depress the boring-tool, substantially as specified.

2. In a hydraulic boring apparatus, the combination, with a pump, of hollow connectingrods, a cylinder connected to one of said rods, a plunger within said cylinder, a boring-tool, and a spring for assisting in the elevation of the plunger, substantially as specified.

In ahydraulic boring apparatus, the combination, with a pump, of hollow connectingrods, a cylinder connected to one of said rods, a hollow plunger within said cylinder, and a boring-tool, said plunger and boring-tool being provided with apertures for the passage of water, substantially as specified.

In testimony whereof I have signed my n ame to.this specification in the presence of two subscribing witnesses.

FRIEDRICH BUSCIIMANN.

'itnesses:

CHR. lIosER, ll'. RAUPF. 

